The Sigma 120-300mm F2.8 DG OS HSM for Canon EF mount is a versatile and powerful telephoto zoom lens that is designed to cater to the needs of sports and wildlife photographers, as well as those seeking high-quality images in a variety of challenging situations. With a constant aperture of f/2.8 throughout its zoom range, this lens stands out in low-light environments and allows for beautiful background separation, making it a favorite among portrait and event photographers as well.
One of the most impressive features of the Sigma 120-300mm is its optical performance. The lens incorporates advanced glass elements, including multiple low dispersion (LD) glass elements and a Special Low Dispersion (SLD) element, which work together to minimize chromatic aberration and ensure sharp, detailed images even at longer focal lengths. The lens also incorporates a multi-layer coating to reduce flare and ghosting, resulting in vibrant colors and contrast in your images.
The lens's build quality is another highlight, featuring a robust and weather-sealed construction that provides durability and resilience against the elements. This lens is substantial in weight, weighing approximately 3.5kg (7.7 lbs), which means that while it offers excellent stability and handling, using it for extended periods may require a sturdy tripod or monopod for support. The zoom mechanism operates smoothly and the focus adjustment is responsive, aided by Sigma's Hyper Sonic Motor (HSM) for fast and silent autofocus, making it suitable for capturing fast-moving subjects.
One potential downside to consider is its size and weight. As mentioned earlier, the Sigma 120-300mm is quite hefty, which may not be ideal for all photographers, especially those who prefer a lightweight and compact setup. Additionally, while the lens does an admirable job of maintaining sharpness across the zoom range, some users have reported a slight drop in resolution at 300mm compared to the shorter focal lengths. This is a common occurrence with telephoto zooms, but it's worth keeping in mind if absolute sharpness is critical for your work.
In conclusion, the Sigma 120-300mm F2.8 DG OS HSM lens for Canon EF mount is an exceptional choice for photographers who need versatility and high-quality optics in a telephoto zoom lens. Its fast aperture and superior build quality make it a powerful tool for capturing stunning images in various conditions, be it fast-paced sports events or wildlife encounters. While its weight and size might not be suitable for everyone, those who can manage it will be rewarded with outstanding performance and results that are well worth the investment.